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Discussion Starter #1
My questions:

1. Are the M3 axles different lengths to the 328 axles because of a difference in the trailing arm or a difference in the size of the differential?

2. Will any E46 or other series differentials drop in?

My situation:

After 5000 miles of putting up with grinding, a rear wheel bearing is finally annoying me. If I'm going to take the trailing arms to a shop for press-work, why not replace all the rubber in the rear end? Looks like I am taking out the subframe to do that, so now would be a great time for lower gears and real LSD.

Going to try the trailing arm bush from the M3 and the on the outside of both control arms instead of the '136.311 on the lower. We'll see how that works out.
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